1 /////////////////////////////////////////////////////////////////////////// 2 // 3 // Copyright (c) 2002, Industrial Light & Magic, a division of Lucas 4 // Digital Ltd. LLC 5 // 6 // All rights reserved. 7 // 8 // Redistribution and use in source and binary forms, with or without 9 // modification, are permitted provided that the following conditions are 10 // met: 11 // * Redistributions of source code must retain the above copyright 12 // notice, this list of conditions and the following disclaimer. 13 // * Redistributions in binary form must reproduce the above 14 // copyright notice, this list of conditions and the following disclaimer 15 // in the documentation and/or other materials provided with the 16 // distribution. 17 // * Neither the name of Industrial Light & Magic nor the names of 18 // its contributors may be used to endorse or promote products derived 19 // from this software without specific prior written permission. 20 // 21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 // 33 /////////////////////////////////////////////////////////////////////////// 34 35 36 #ifndef INCLUDED_IMF_CONVERT_H 37 #define INCLUDED_IMF_CONVERT_H 38 39 //----------------------------------------------------------------------------- 40 // 41 // Routines for converting between pixel data types, 42 // with well-defined behavior for exceptional cases, 43 // without depending on how hardware and operating 44 // system handle integer overflows and floating-point 45 // exceptions. 46 // 47 //----------------------------------------------------------------------------- 48 49 #include "half.h" 50 #include "ImfExport.h" 51 #include "ImfNamespace.h" 52 53 OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER 54 55 56 //--------------------------------------------------------- 57 // Conversion from half or float to unsigned int: 58 // 59 // input result 60 // --------------------------------------------------- 61 // 62 // finite, >= 0 input, cast to unsigned int 63 // (rounds towards zero) 64 // 65 // finite, < 0 0 66 // 67 // NaN 0 68 // 69 // +infinity UINT_MAX 70 // 71 // -infinity 0 72 // 73 //--------------------------------------------------------- 74 75 IMF_EXPORT unsigned int halfToUint (half h); 76 IMF_EXPORT unsigned int floatToUint (float f); 77 78 79 //--------------------------------------------------------- 80 // Conversion from unsigned int or float to half: 81 // 82 // input result 83 // --------------------------------------------------- 84 // 85 // finite, closest possible half 86 // magnitude <= HALF_MAX 87 // 88 // finite, > HALF_MAX +infinity 89 // 90 // finite, < -HALF_MAX -infinity 91 // 92 // NaN NaN 93 // 94 // +infinity +infinity 95 // 96 // -infinity -infinity 97 // 98 //--------------------------------------------------------- 99 100 IMF_EXPORT half uintToHalf (unsigned int ui); 101 IMF_EXPORT half floatToHalf (float f); 102 103 104 OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT 105 106 107 #endif 108